Safety hook



Patented Apr. 13, 1.926.

UNITED STATI-:fs

PATENT oFFics. g

DEWITT PATTISON CROMWELL, 0E HUBBARD, OHIO, AND PATTISON CROMWELL, OF TERRE HAUTE, INDIANA.

SAFETY Hoox.

Application filed April 8, 1925. Serial No. 21,539.

T 0 all whom t may concern:

Be it known that we, DEWITT PAT'risON CRouwnLL and PATTTsoN CRoMwniiL, citizens of the United States, and residents, respectively, of Hubbard, in the county` of yIrunibull and thel State of Ohio, and of Terre Haute, in the county of Vigo and the State of Indiana, have invented a new and useful Safety Hook, of which the following is the specification.

The invention pertains to an improved method for the handling of steel rails, ties, piling, cribbing or any structural material that is used in the construction of railroads and commercial construction, or in the repairs of same; and the objects of the invention are, first, to provide a safe method of handling the above material, second, to decrease the costs of handling the same; and,

third, to provide a device that is generally usefulto this class o-f construction or repair, that is, a machine that does several vclasses of work along these lines, such as removing objects such as ties, piling or telephone poles that are submerged under water.

One form of the invention is illustrated in the accompanying drawing in which Figure 1, is a vertical cross-section of the entire ina-- chine, certain parts being shown in elevation; Figure 2, is a side view of the cylinder; Figure 3, is an elevational view ofthe double hooks and counter-weight; and Figure t, is a to plan view of the cylinder.

Tie cylinder, 1, is the outside casing of the machine and it is also the guide and holder for the counter-weight, 2, and the double-hook, 8, d8, 9, mechanism. Throug'ii the lower end of the cylinder, 1, is the stationary shaft, 10, upon which pivots the double hooks, 8, 8, 9. This cylinder, 1, is provided with the lifting cap, 3.

rlhe lifting rod lug, 6, is keyed ing rod, 5, by the key arrangement, 15. The lifting rod, 5, is connected to the connecting links, 11 and 11, -12 and 12, by the connecting pin, 13, and the connecting links are to ai@ liaconnected to the double hooks by the connecting pins, 14. The double hooks, 8, -8, 9, pivot on the shaft, 10, which, being stationary, also supports the counter-weight, '2, when hooks are open.

The machine in operation is used on anyT steam or electric crane having a holding and closing cable. The holding cable` supports the machine by the lifting lugs, .7, 7. and the double hook, 8, 8, 9, will be in the open position. The closing cable is attached to the lifting rod lug, 6, and when this cable is tightened and the holding cable is slacked off a trifle, the hooks will close on any desired object. VVlien this object is released, the holding cable is held tight and the clos ing cable is vslacked off and the counterweight, 2, drops of its own weight and opens the double hooks.

l/Vevdo know that prior to our'invei'ition, common tongs and cable slings were used to handle railroad ties, rails and piling.

However, we claim:

1. Ina safety hook construction the conibination of a pair of parallel hooks pivotallyy mountedV in spaced relation intermediate their ends and movable as a unit, an oppositely directed and similarly mounted hook positioned intermediate said unitarily movable hooks and having the same pivotal axis,

and a weighted toggle linkage normally` maintaining said hooks in open relation and actuatable in opposition to the weighting thereof for closing said hooks.

2. In a safety hook construction, the coinbinationof a supported tubular casing, a

rod Vslidably supported tlierein,1a combina 1 tion guide and counter weight carried by the rod and-slidably supported within said casing for guiding said rod, a fixedy pivot supported by said casing, hooks pivotally supported'upon said pivot, and toggle links within and protecced by the casing and pivotally connected to the hooks and the rod. DEVITT PATTISON CROMVELL. PATTISON CROMVVELLL 

